I think it's the same with any component - there's always people that love them and always people that don't. Probably why we're not all riding the same bikes with the same components.
I used single walls for 6 months, and I've recently bought some double walls from CRC for £35, which seemed perfectly reasonable to me. They're the 2.5in ones with the nice upsweep, and they suit me just fine.
Not sure about durability, as I've only had them a few weeks, but the aforementioned single walls are still in perfect condition.